<template>
  <view v-if="show" class="uni-noticebar" :style="{ backgroundColor: backgroundColor }" @click="onClick">
    <uni-icons v-if="showIcon === true || showIcon === 'true'" class="uni-noticebar-icon" type="sound" :color="color"
      size="22" />
    <view ref="textBox" class="uni-noticebar__content-wrapper"
      :class="{'uni-noticebar__content-wrapper--scrollable':scrollable, 'uni-noticebar__content-wrapper--single':!scrollable && (single || moreText)}">
      <view :id="elIdBox" class="uni-noticebar__content"
        :class="{'uni-noticebar__content--scrollable':scrollable, 'uni-noticebar__content--single':!scrollable && (single || moreText)}">
        <text :id="elId" ref="animationEle" class="uni-noticebar__content-text"
          :class="{'uni-noticebar__content-text--scrollable':scrollable,'uni-noticebar__content-text--single':!scrollable && (single || showGetMore)}"
          :style="{color:color, width:wrapWidth+'px', 'animationDuration': animationDuration, '-webkit-animationDuration': animationDuration ,animationPlayState: webviewHide?'paused':animationPlayState,'-webkit-animationPlayState':webviewHide?'paused':animationPlayState, animationDelay: animationDelay, '-webkit-animationDelay':animationDelay}">{{text}}</text>
      </view>
    </view>
    <view v-if="showGetMore === true || showGetMore === 'true'" class="uni-noticebar__more uni-cursor-point"
      @click="clickMore">
      <text v-if="moreText.length > 0" :style="{ color: moreColor }" class="uni-noticebar__more-text">{{ moreText
        }}</text>
      <uni-icons v-else type="right" :color="moreColor" size="16" />
    </view>
    <view class="uni-noticebar-close uni-cursor-point"
      v-if="(showClose === true || showClose === 'true') && (showGetMore === false || showGetMore === 'false')">
      <uni-icons type="closeempty" :color="color" size="16" @click="close" />
    </view>
  </view>
</template>

<script>
  // #ifdef APP-NVUE
  const dom = weex.requireModule('dom');
  const animation = weex.requireModule('animation');
  // #endif

  /**
   * NoticeBar 自定义导航栏
   * @description 通告栏组件
   * @tutorial https://ext.dcloud.net.cn/plugin?id=30
   * @property {Number} speed 文字滚动的速度，默认100px/秒
   * @property {String} text 显示文字
   * @property {String} backgroundColor 背景颜色
   * @property {String} color 文字颜色
   * @property {String} moreColor 查看更多文字的颜色
   * @property {String} moreText 设置“查看更多”的文本
   * @property {Boolean} single = [true|false] 是否单行
   * @property {Boolean} scrollable = [true|false] 是否滚动，为true时，NoticeBar为单行
   * @property {Boolean} showIcon = [true|false] 是否显示左侧喇叭图标
   * @property {Boolean} showClose = [true|false] 是否显示左侧关闭按钮
   * @property {Boolean} showGetMore = [true|false] 是否显示右侧查看更多图标，为true时，NoticeBar为单行
   * @event {Function} click 点击 NoticeBar 触发事件
   * @event {Function} close 关闭 NoticeBar 触发事件
   * @event {Function} getmore 点击”查看更多“时触发事件
   */

  export default {
    name: 'UniNoticeBar',
    emits: ['click', 'getmore', 'close'],
    props: {
      text: {
        type: String,
        default: ''
      },
      moreText: {
        type: String,
        default: ''
      },
      backgroundColor: {
        type: String,
        default: '#FFF9EA'
      },
      speed: {
        // 默认1s滚动100px
        type: Number,
        default: 100
      },
      color: {
        type: String,
        default: '#FF9A43'
      },
      moreColor: {
        type: String,
        default: '#FF9A43'
      },
      single: {
        // 是否单行
        type: [Boolean, String],
        default: false
      },
      scrollable: {
        // 是否滚动，添加后控制单行效果取消
        type: [Boolean, String],
        default: false
      },
      showIcon: {
        // 是否显示左侧icon
        type: [Boolean, String],
        default: false
      },
      showGetMore: {
        // 是否显示右侧查看更多
        type: [Boolean, String],
        default: false
      },
      showClose: {
        // 是否显示左侧关闭按钮
        type: [Boolean, String],
        default: false
      }
    },
    data() {
      const elId = `Uni_${Math.ceil(Math.random() * 10e5).toString(36)}`
      const elIdBox = `Uni_${Math.ceil(Math.random() * 10e5).toString(36)}`
      return {
        textWidth: 0,
        boxWidth: 0,
        wrapWidth: '',
        webviewHide: false,
        // #ifdef APP-NVUE
        stopAnimation: false,
        // #endif
        elId: elId,
        elIdBox: elIdBox,
        show: true,
        animationDuration: 'none',
        animationPlayState: 'paused',
        animationDelay: '0s'
      }
    },
    mounted() {
      // #ifdef APP-PLUS
      var pages = getCurrentPages();
      var page = pages[pages.length - 1];
      var currentWebview = page.$getAppWebview();
      currentWebview.addEventListener('hide', () => {
        this.webviewHide = true
      })
      currentWebview.addEventListener('show', () => {
        this.webviewHide = false
      })
      // #endif
      this.$nextTick(() => {
        this.initSize()
      })
    },
    // #ifdef APP-NVUE
    beforeDestroy() {
      this.stopAnimation = true
    },
    // #endif
    methods: {
      initSize() {
        if (this.scrollable) {
          // #ifndef APP-NVUE
          let query = [],
            boxWidth = 0,
            textWidth = 0;
          let textQuery = new Promise((resolve, reject) => {
            uni.createSelectorQuery()
              // #ifndef MP-ALIPAY
              .in(this)
              // #endif
              .select(`#${this.elId}`)
              .boundingClientRect()
              .exec(ret => {
                this.textWidth = ret[0].width
                resolve()
              })
          })
          let boxQuery = new Promise((resolve, reject) => {
            uni.createSelectorQuery()
              // #ifndef MP-ALIPAY
              .in(this)
              // #endif
              .select(`#${this.elIdBox}`)
              .boundingClientRect()
              .exec(ret => {
                this.boxWidth = ret[0].width
                resolve()
              })
          })
          query.push(textQuery)
          query.push(boxQuery)
          Promise.all(query).then(() => {
            this.animationDuration = `${this.textWidth / this.speed}s`
            this.animationDelay = `-${this.boxWidth / this.speed}s`
            setTimeout(() => {
              this.animationPlayState = 'running'
            }, 1000)
          })
          // #endif
          // #ifdef APP-NVUE
          dom.getComponentRect(this.$refs['animationEle'], (res) => {
            let winWidth = uni.getSystemInfoSync().windowWidth
            this.textWidth = res.size.width
            animation.transition(this.$refs['animationEle'], {
              styles: {
                transform: `translateX(-${winWidth}px)`
              },
              duration: 0,
              timingFunction: 'linear',
              delay: 0
            }, () => {
              if (!this.stopAnimation) {
                animation.transition(this.$refs['animationEle'], {
                  styles: {
                    transform: `translateX(-${this.textWidth}px)`
                  },
                  timingFunction: 'linear',
                  duration: (this.textWidth - winWidth) / this.speed * 1000,
                  delay: 1000
                }, () => {
                  if (!this.stopAnimation) {
                    this.loopAnimation()
                  }
                });
              }
            });
          })
          // #endif
        }
        // #ifdef APP-NVUE
        if (!this.scrollable && (this.single || this.moreText)) {
          dom.getComponentRect(this.$refs['textBox'], (res) => {
            this.wrapWidth = res.size.width
          })
        }
        // #endif
      },
      loopAnimation() {
        // #ifdef APP-NVUE
        animation.transition(this.$refs['animationEle'], {
          styles: {
            transform: `translateX(0px)`
          },
          duration: 0
        }, () => {
          if (!this.stopAnimation) {
            animation.transition(this.$refs['animationEle'], {
              styles: {
                transform: `translateX(-${this.textWidth}px)`
              },
              duration: this.textWidth / this.speed * 1000,
              timingFunction: 'linear',
              delay: 0
            }, () => {
              if (!this.stopAnimation) {
                this.loopAnimation()
              }
            });
          }
        });
        // #endif
      },
      clickMore() {
        this.$emit('getmore')
      },
      close() {
        this.show = false;
        this.$emit('close')
      },
      onClick() {
        this.$emit('click')
      }
    }
  }
</script>

<style lang="scss">
  .uni-noticebar {
    /* #ifndef APP-NVUE */
    display: flex;
    width: 100%;
    box-sizing: border-box;
    /* #endif */
    flex-direction: row;
    align-items: center;
    padding: 0 12px;
  }

  .uni-cursor-point {
    /* #ifdef H5 */
    cursor: pointer;
    /* #endif */
  }

  .uni-noticebar-close {
    margin-left: 8px;
    margin-right: 5px;
  }

  .uni-noticebar-icon {
    margin-right: 5px;
  }

  .uni-noticebar__content-wrapper {
    flex: 1;
    flex-direction: column;
    overflow: hidden;
  }

  .uni-noticebar__content-wrapper--single {
    /* #ifndef APP-NVUE */
    line-height: 18px;
    /* #endif */
  }

  .uni-noticebar__content-wrapper--single,
  .uni-noticebar__content-wrapper--scrollable {
    flex-direction: row;
  }

  /* #ifndef APP-NVUE */
  .uni-noticebar__content-wrapper--scrollable {
    position: relative;
    height: 18px;
  }

  /* #endif */

  .uni-noticebar__content--scrollable {
    /* #ifdef APP-NVUE */
    flex: 0;
    /* #endif */
    /* #ifndef APP-NVUE */
    flex: 1;
    display: block;
    overflow: hidden;
    /* #endif */
  }

  .uni-noticebar__content--single {
    /* #ifndef APP-NVUE */
    display: flex;
    flex: none;
    width: 100%;
    justify-content: center;
    /* #endif */
  }

  .uni-noticebar__content-text {
    font-size: 14px;
    line-height: 18px;
    /* #ifndef APP-NVUE */
    word-break: break-all;
    /* #endif */
  }

  .uni-noticebar__content-text--single {
    /* #ifdef APP-NVUE */
    lines: 1;
    /* #endif */
    /* #ifndef APP-NVUE */
    display: block;
    width: 100%;
    white-space: nowrap;
    /* #endif */
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .uni-noticebar__content-text--scrollable {
    /* #ifdef APP-NVUE */
    lines: 1;
    padding-left: 750rpx;
    /* #endif */
    /* #ifndef APP-NVUE */
    position: absolute;
    display: block;
    height: 18px;
    line-height: 18px;
    white-space: nowrap;
    padding-left: 100%;
    animation: notice 10s 0s linear infinite both;
    animation-play-state: paused;
    /* #endif */
  }

  .uni-noticebar__more {
    /* #ifndef APP-NVUE */
    display: inline-flex;
    /* #endif */
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    padding-left: 5px;
  }

  .uni-noticebar__more-text {
    font-size: 14px;
  }

  @keyframes notice {
    100% {
      transform: translate3d(-100%, 0, 0);
    }
  }
</style>